DNA and RNA Bases. In DNA, there are four different bases: adenine (A) and guanine (G) are the larger purines. Cytosine (C) and thymine (T) are the smaller pyrimidines.
Gretna is the second-largest city and parish seat of Jefferson Parish, Louisiana, United States. Gretna is on the west bank of the Mississippi River, just east and across the river from uptown New Orleans. It is part of the New Orleans â Metairie â Kenner Metropolitan Statistical Area. The population was 17,736 at the 2010 census.
Sex Offenders Registry Statistics For Gretna, VA. Our database shows there are 15 registered Sex Offenders in Gretna, VA, a ratio of 106.46 offenders per 10,000 residents. This is higher than the national average of 14.51 offenders per 10,000 residents.